Hello every one, I been looking around how different blender CAD solutions has been going but I find it difficult due to there are so many of them that has been started up, does any one know about some blender cad that is still beeing worked on or have been taken far in development? Maybe some one know of some other opensorce 3d CAD tools avalible?

What I have found that seams most promessing at the time beeing is Freecad and qcad

Watch the first 3 tutor videos of this software at the you tube address above and you will soon realize that you will never need to look any furtherfor drawing software for your 3d printer. The capabilities of this software are without limit.

Blender is a very nice 3D _modeler_. It's NOT a CAD tool! If you want to build cute organic shapes, or spaceships or whatever, Blender works just great. If you want to build mechanical parts that have to fit to pre-existing objects or to build something like a new 3D printer, it is NOT the tool you want to choose.

A good open source, parametric design tool is FreeCAD. Avoid OpenSCAD. It's a poor programming language badly masquerading as a parametric design tool. Commercially, you can go with AutoDesk Inventor (my choice) or SolidWorks.

I'd no more use Blender for CAD than I'd use a crayon to mark something I'd just measured with a micrometer.